The ProTac HL 5X USB is a 3500 lumen tactical flashlight that can use either two proprietary Streamlight SLB26 protected LiIon USB rechargeable battery packs or four CR123A disposable batteries. The ProTac HL 5X USB is a completely rechargeable system that comes with a charge cord and two SLB26 rechargeable battery packs that feature integrated mircoUSB charge ports. The ProTac HL 5X USB is the newest and brightest addition to the ProTac series. It offers the latest in power LED technology and three different user selectable programs. The output from the LED results in one of the brightest tactical lights available. The sure grip rubber sleeve and included lanyard ensures youll never lose your grip.